3.13Reliability
3.13.1Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)
The product shall achieve an Annualized Failure Rate (AFR) of 0.73% (MTBF of 1.2 million hours) when oper- ated nominal power and typical case temperatures of 40°C. Operation at temperatures outside the specifica- tions in Section 3.9 may increase the product AFR (decrease MTBF). AFR and MTBF are population statistics that are not relevant to individual units.
AFR and MTBF specifications are based on the following assumptions for business critical storage system environments:
•8,760
•Operations at nominal voltages.
•Temperatures outside the specifications in Section 3.9 may reduce thee product reliability.
•Normal I/O duty cycle for enterprise nearline applications. Operation at excessive I/O duty cycle may degrade product reliability.
The enterprise application nearline environment of
Nonrecoverable read errors | 1 per 1015 bits read, max |
Annualized Failure Rate (AFR) | 0.73% (nominal power, 40°C case temperature) |
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Load unload cycles | 300,000 cycles |
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Warranty | To determine the warranty for a specific drive, use a web browser to access the |
| following web page: support.seagate.com/customer/warranty_validation.jsp |
| From this page, click on the "Verify Your Warranty" link. You will be asked to provide |
| the drive serial number, model number (or part number) and country of purchase.The |
| system will display the warranty information for your drive. |
Preventive maintenance | None required. |
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3.14Agency certification
3.14.1Safety certification
These products are certified to meet the requirements of
3.14.2Electromagnetic compatibility
Hard drives that display the CE mark comply with the European Union (EU) requirements specified in the Elec- tromagnetic Compatibility Directive (2004/108/EC) as put into place 20 July 2007. Testing is performed to the levels specified by the product standards for Information Technology Equipment (ITE). Emission levels are defined by EN 55022, Class B and the immunity levels are defined by EN 55024.
Drives are tested in representative
20 | Constellation ES Serial ATA Product Manual, Rev. D |